ProductsABEC - Studies

Introduction to ABEC with Modeled Loudspeaker Enclosure

This slide-show
gives a short introduction to ABEC and
demonstrates the components of the simulation of a complex
loudspeaker cabinet.

The experiment makes a comparison between simulation and measurement.
It features three drivers mounted with the rear in a common sealed enclosure
and at the front in a short common horn-stub.
In order to capture main topics the structure features complicated
boundaries and induces strong coupling between the Boundary and Lumped Element
parts. The size of the three drivers where kept small intentionally
in order to minimize the influence of mechanical eigen-motion of the
membranes.

The associated ABEC3-project is part of the Example-Package. See at folder.

Modeling a JBL 4530 Horn Loading Cabinet

This slide-show gives an overview
of modeling a horn loaded bass-cabinet. My friend Renzo dropped this monster
one day at my door-step. This loudspeaker is a remains of the famous Bogart
discotheque here in my neighborhood. I thought it may serve for a good
tutorial example in modeling with ABEC.

The modeling is complex as it comprises seven sub-domains, and coupling to lumped elements.
The measurement was challenging as we had to do it out-doors.

The associated ABEC3-project is part of the Example-Package. See at folder.

ABEC3 Examples\BEM\Loudspeakers\Speaker Cabinet Bass-Horn Bogart

Modeling a Vented Cabinet

This slide-show gives an overview
of modeling a classic vented enclosure with a single 15" drive unit.

The model features the combination of three sub-domains, one for the
interior, one for the vent and one sub-domain for the exterior. Again, the
diaphragm is coupled to a lumped element network, which takes care of
the mechanics and electronics.

The fit of the simulation-curves to measurement is encouraging.
Again, the measurements had to be done out-doors.

The associated ABEC-project is part of the Example-Package.
It is called SP38.abec.

Modeling a Horn and Compression Driver

This slide-show gives an overview
of modeling a mid-range horn driven by a compression driver.

In this setup only the horn-bell and the radiation is modeled with the
help of BEM. The first part of the horn and the compression driver
are simulated by Lumped Elements.
This example also demonstrates a trick, which simplifies the modeling
procedure of the exterior by avoiding input of the exterior of the horn shape.

The voice-coil slit of the compression driver, which is used in this
example, is filled with ferro-fluid. Otherwise, the modeling of
the compression driver would have been more complex.

The associated ABEC-project is part of the Example-Package.
It is called Horn H 400 LE.abec.